SANTA CLARA — Kyle Williams, of all 49ers, knows this is not just another game, not after what went down against the New York Giants in last season’s NFC Championship game.

While many teammates attempted to relegate Sunday’s rematch as merely Game No. 6 of 16, Williams wants to avenge both the 49ers’ overtime defeat and his personal impact on it.

“There are a few teams I look forward to. Of course, after what happened last year, I want to get back at these guys,” Williams said Tuesday.

“It’s nothing other than any other team that beat us last year — if the Ravens were on there, we look at Arizona, they beat us last year … It’s not totally out of the ordinary. You want to win every single game.”

The Giants took advantage of two botched punt returns by Williams to pull out the 20-17 victory, and they then advanced to win the Super Bowl against the New England Patriots. It was the Giants’ second championship in five seasons.

“We look at is as: they have something we should have had,” Williams added. “We’re not going to leave anything on the field this time.”

Williams has been a model pro in terms of accountability and resiliency since the Jan. 22 defeat — and, to his credit, he was just as solid through his first two regular seasons.

Williams said he’ll take the same confident approach into Sunday’s game as he has the 49ers’ previous five this season. Used often in three-receiver sets, Williams has tallied four receptions for 66 yards, including his a 43-yard touchdown catch in Sunday’s 45-3 rout of Buffalo.

On special teams, Williams filled in as the punt returner for the first three games while Ted Ginn Jr. recovered from an ankle injury, and Williams has replaced Kendall Hunter on kickoff returns the past 2ï»¿1/2 games. Williams is averaging 35.7 yards per kickoff return, including a 94-yard effort against Minnesota.

Although the Giants said after last season’s game that Williams could be susceptible to big hits as he was coming off a Dec. 24 concussion, Williams said he never felt targeted in that way. “It sounds stupid,” Williams said. “We’re playing football and everyone is trying to get to the ball.”

Coach Jim Harbaugh, as has been the case throughout the locker room since Jan. 22, has been a staunch supporter of Williams and despises any rehash of the NFC Championship game incidents.

On his radio show Tuesday morning with KNBR 680-AM, Harbaugh was asked about Williams’ mindset, to which Harbaugh cut off the question in anticipation it was headed to familiar “bull crap.” Harbaugh then continued to praise Williams’ contributions, not only this season but throughout his career.

Throughout the 49ers locker room Tuesday, player after player offered up similar lines how they don’t discuss the past and that the Giants did enough to rightfully win the NFC title.

“It’s just another notch on the belt you have to get,” tight end Delanie Walker said of Sunday’s game. “We don’t worry about the past. We focus on the future.”